/**
 * Copyright 2009 Emory University
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated  * documentation files (the 
 * "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to
 * the following conditions: The above copyright notice and this permission
 * notice shall be included in all copies or substantial portions of the
 * Software. 
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO
 * EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
package com.markgrand.structuredSql

/**
 * Used to specify a column and direction in an <tt>OrderByConstraint</tt>.
 */
class OrderByColumn protected (val column : ColumnIdentifier, 
                               val direction : OrderByDirection.Value) extends SQLAppender {
  override def append(builder:StringBuilder) = {
    builder.append(column.toString).append(" ").append(direction.toString)
  }
}

object OrderByColumn {
     def apply(column : ColumnIdentifier) = {new OrderByColumn(column, OrderByDirection.ASCENDING)}
     
     def apply(column : ColumnIdentifier, direction : OrderByDirection.Value) = {
       new OrderByColumn(column, direction)
     }
}